When it comes to shaving, direction matters; dragging your blade the wrong way is a serious no-no that leads to a rougher shave and seriously irritated skin. Underarm hairs grow in from all angles, so be sure to run the razor different directions. Since leg hairs grow downward, start from your ankle or knee and shave in upward strokes. The exception: if your skin is extrasensitive, consider shaving in the direction of hair growth instead of against it. While you may not get as close of a shave, you'll save your skin from unnecessary irritation.